Comparison Guide

Microsoft 365 Copilot vs ChatGPT Enterprise

Microsoft 365 Copilot and ChatGPT Enterprise are the two most-adopted enterprise AI tools, but they solve different problems. Copilot embeds AI inside Microsoft 365 apps your team already uses. ChatGPT Enterprise is a general-purpose assistant accessed through the OpenAI web app and APIs.

Last updated 2026-07-01

Quick Answer

ChatGPT Enterprise wins for most buyers.

Microsoft 365 Copilot wins for businesses on M365; ChatGPT Enterprise wins for general-purpose AI workloads outside the Microsoft stack.

Side-by-Side Comparison

Feature	Microsoft 365 Copilot	ChatGPT Enterprise
Best Ecosystem Fit	Microsoft 365 (Outlook, Word, Excel, Teams)	Standalone or any productivity stack
Data Residency	Microsoft 365 tenant; honors existing permissions	OpenAI infrastructure; tenant-scoped, not used for training
In-App Integration	Native inside Word, Excel, Outlook, Teams, PowerPoint	Web app, mobile, API; not embedded in M365
Custom Agents	Copilot Studio agents using M365 data	Custom GPTs trained on uploaded documents and APIs
Image Generation	Designer integration (DALL-E backend)	DALL-E 3 native
Pricing (per user/month)	Approximately $30 plus M365 Business plan	Approximately $60 (varies by seat count)
Governance	Microsoft Purview, sensitivity labels, DLP	Admin console with workspace controls
Best For	Teams already on M365 wanting embedded AI	Teams wanting general-purpose AI plus custom workflows

Our Verdict

If most of your workflow lives in Microsoft 365 (Outlook, Word, Excel, Teams, SharePoint), Microsoft 365 Copilot delivers more value because it works inside the apps. If your team needs general-purpose AI for writing, analysis, coding, and custom workflow automation, ChatGPT Enterprise is the more flexible platform. Most mid-market businesses end up using both, with Copilot for in-app productivity and ChatGPT for general assistance.

Unio Digital recommends: Microsoft 365 Copilot wins for businesses on M365; ChatGPT Enterprise wins for general-purpose AI workloads outside the Microsoft stack

Quick Picks

Which one should you pick?

Three buyer profiles, three answers. Pick the row that fits.

M365-committed SMB / mid-market

Pick: Microsoft 365 Copilot

Your day runs in Outlook, Teams, Excel, and SharePoint. Copilot adds $30/user/month on a qualifying M365 plan and works inside the apps, once SharePoint oversharing and sensitivity labels are cleaned up first.

Scope a Copilot rollout

General-purpose AI, mixed or non-Microsoft stack

Pick: ChatGPT Enterprise

Writing, analysis, coding, and custom GPTs that reach beyond M365. Seats are custom quoted by seat count, commonly reported near $60/user/month, with SOC 2 Type 2 and ISO 27001 coverage on OpenAI's side.

Talk to an AI strategist

In-house IT, licensing and guardrails only

Pick: Both

You will run the tenant yourself. We price the seats, remediate oversharing, set DLP and an AI use policy before licenses go live, then hand over the keys.

Price the licenses

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Frequently Asked Questions

Use Microsoft 365 Copilot if most of your team's work happens inside Outlook, Word, Excel, Teams, and SharePoint. The in-app integration delivers measurable productivity from day one. Use ChatGPT Enterprise if you need a general-purpose AI for writing, analysis, custom GPTs trained on your data, or workflows outside the Microsoft stack. Many mid-market businesses end up running both.

No. OpenAI's Enterprise tier explicitly excludes business prompts from model training. Workspace owners control retention and data export. This is one of the key differences from the consumer ChatGPT Plus tier, which can use prompts for training unless opted out.

Yes. Copilot inherits Microsoft 365 access controls, which means any pre-existing oversharing in SharePoint or OneDrive becomes a Copilot search result on day one. This is why a proper Copilot deployment includes oversharing remediation, sensitivity-label enforcement, and DLP policies before licenses go live.

Learn More About Microsoft Copilot

Visit our comprehensive Microsoft Copilot page for detailed information about our capabilities and approach.

Explore Microsoft Copilot Services

Sources & Methodology

Specifications, pricing, and product capabilities cited on this page are sourced from public vendor documentation as of the dates shown below. Vendor product lines change quickly; verify current specs and pricing directly with each vendor before purchasing.

Microsoft 365 Copilot is priced at $30.00 per user per month paid yearly ($31.50 per month on monthly billing with an annual commitment) and is sold as an add-on that requires a qualifying Microsoft 365 base plan. [source] · verified 2026-07-01
Microsoft states that prompts, responses, and data accessed through Microsoft Graph are not used to train foundation LLMs, and that Microsoft 365 Copilot only surfaces organizational data to which the individual user has at least view permissions. [source] · verified 2026-07-01
Prompts, retrieved data, and generated responses in Microsoft 365 Copilot remain within the Microsoft 365 service boundary; Copilot was added as a covered workload in Microsoft's data residency commitments on March 1, 2024 and is an EU Data Boundary service for EU customers. [source] · verified 2026-07-01
OpenAI's trust portal lists a SOC 2 Type 2 report covering the API Platform, ChatGPT Enterprise, ChatGPT Edu, and ChatGPT Team, plus ISO/IEC 27001:2022, 27017, 27018, and 27701 certifications covering OpenAI's API, ChatGPT Enterprise, and ChatGPT Edu, and ISO/IEC 42001:2023. [source] · verified 2026-07-01
As of March 1, 2023, data sent to the OpenAI API is not used to train or improve OpenAI models unless the customer explicitly opts in, and abuse-monitoring logs retain API usage for up to 30 days by default unless longer retention is required by law. [source] · verified 2026-07-01
NIST released the voluntary AI Risk Management Framework (AI RMF 1.0) on January 26, 2023, organized around four functions (Govern, Map, Measure, Manage), and released the Generative AI Profile (NIST-AI-600-1) on July 26, 2024. [source] · verified 2026-07-01